Lessons
Scala · Medium
Scala · Medium. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
Pass all ten lessons for the certificate. Sample · Claim
Lesson 1 · On the house
Either
Left/Right, map, flatMap, fold, vs Option.
Lesson 2
Try
Success/Failure, Try(...), recover, toEither.
Lesson 3
Futures basics
Future { }, map/flatMap, onComplete, Await.result.
Lesson 4
ExecutionContext
global, fromExecutor, blocking, where work runs.
Lesson 5
Implicit parameters
implicit params, implicit vals, summoning.
Lesson 6
Context bounds
[A: Ordering], implicitly, type-class style.
Lesson 7
Lazy val and by-name
lazy val, => params, call-by-name vs lazy.
Lesson 8
PartialFunction
case blocks as values, isDefinedAt, orElse, collect.
Lesson 9
Variance deeper
co/contravariance, +A -A, Function1, bounds.
Lesson 10
Medium capstone
Either + Try + Future + implicits + PF composed.
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Certificate
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